Second season I thought was kind of bad the moment Sophia went missing. They spent way too much time on the farm in my opinion, although it picked up towards the end.

Hopefully they'll do the prison better.

Spoiler!

i'm very doubtful they can pull off an exciting season for the prison after two seasons of mostly boring drama. still i'm hopeful though and i thought michone looked very cool in her brief scene at the end of season 2